Visual Studio If

  1. Installing Visual Micro Into Visual Studio (with Arduino)
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Conditionally compiles selected blocks of Visual Basic code.

Syntax

Visual Studio extension development. Create add-ons and extensions for Visual Studio, including new commands, code analyzers, and tool windows. Add the SDKs and tools you need to create new commands, code analyzers, tool windows, and language services using C#. Then, share your extension with the community in the Visual Studio. This download installs the Visual Studio 2010 Tools for Office Runtime, which is required to run Microsoft Office based solutions built using Microsoft Visual Studio 2010, 2012, 2013 and 2015. Visual Studio Code is a streamlined code editor with support for development operations like debugging, task running, and version control. It aims to provide just the tools a developer needs for a quick code-build-debug cycle and leaves more complex workflows to fuller featured IDEs, such as Visual Studio IDE. Which OSs are supported?

Parts

expression
Required for #If and #ElseIf statements, optional elsewhere. Any expression, consisting exclusively of one or more conditional compiler constants, literals, and operators, that evaluates to True or False.

statements
Required for #If statement block, optional elsewhere. Visual Basic program lines or compiler directives that are compiled if the associated expression evaluates to True.

#End If
Terminates the #If statement block.

Remarks

On the surface, the behavior of the #If...Then...#Else directives appears the same as that of the If...Then...Else statements. However, the #If...Then...#Else directives evaluate what is compiled by the compiler, whereas the If...Then...Else statements evaluate conditions at run time.

Conditional compilation is typically used to compile the same program for different platforms. It is also used to prevent debugging code from appearing in an executable file. Code excluded during conditional compilation is completely omitted from the final executable file, so it has no effect on size or performance.

Regardless of the outcome of any evaluation, all expressions are evaluated using Option Compare Binary. The Option Compare statement does not affect expressions in #If and #ElseIf statements.

Visual studio ifdef debug

Note

Studio

No single-line form of the #If, #Else, #ElseIf, and #End If directives exists. No other code can appear on the same line as any of the directives.

The statements within a conditional compilation block must be complete logical statements. For example, you cannot conditionally compile only the attributes of a function, but you can conditionally declare the function along with its attributes:

C# if not debug

Example

This example uses the #If...Then...#Else construct to determine whether to compile certain statements.

See also

Installing Visual Micro Into Visual Studio (with Arduino)

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